A 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of
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A 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 6.0 N and a vertical force P are then applied to the block (Figure). The coefficients of friction for the block and surface are μs = 0.40 and μk = 0.25. Determine the magnitude of the frictional force acting on the block if the magnitude of P is
(a) 8.0 N,
(b) 10 N, and
(c) 12 N.
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